/*
 * Copyright The WildFly Authors
 * SPDX-License-Identifier: Apache-2.0
 */

package org.jboss.as.test.integration.transactions;

import java.util.ArrayList;
import java.util.List;
import javax.transaction.xa.XAException;
import javax.transaction.xa.XAResource;
import javax.transaction.xa.Xid;

import org.jboss.logging.Logger;

/**
 * Test {@link XAResource} class.
 *
 * @author Ondra Chaloupka <ochaloup@redhat.com>
 */
public class TestXAResource implements XAResource {
    private static Logger log = Logger.getLogger(TestXAResource.class);

    public enum TestAction {
        NONE,
        PREPARE_THROW_XAER_RMERR, PREPARE_THROW_XAER_RMFAIL, PREPARE_THROW_UNKNOWN_XA_EXCEPTION, PREPARE_CRASH_VM,
        COMMIT_THROW_XAER_RMERR, COMMIT_THROW_XAER_RMFAIL, COMMIT_THROW_XA_RBROLLBACK, COMMIT_THROW_UNKNOWN_XA_EXCEPTION, COMMIT_CRASH_VM,
    }

    // prepared xids are shared over all the TestXAResource instances in the JVM
    // used for the recovery purposes as the XAResourceRecoveryHelper works with a different instance
    // of the XAResource than the one which is used during 2PC processing
    private static final List<Xid> preparedXids = new ArrayList<>();

    private TransactionCheckerSingleton checker;
    private int transactionTimeout;

    protected TestAction testAction;


    public TestXAResource(TransactionCheckerSingleton checker) {
        this(TestAction.NONE, checker);
    }

    public TestXAResource() {
        this(TestAction.NONE);
    }

    public TestXAResource(TestAction testAction) {
        // the checker singleton can't be used to check processing as it's not injected as a bean
        this(testAction, new TransactionCheckerSingleton());
    }

    public TestXAResource(TestAction testAction, TransactionCheckerSingleton checker) {
        log.debugf("created %s with testAction %s and checker %s", this.getClass().getName(), testAction, checker);
        this.checker = checker;
        this.testAction = testAction;
    }

    @Override
    public int prepare(Xid xid) throws XAException {
        log.debugf("prepare xid: [%s], test action: %s", xid, testAction);
        checker.addPrepare();

        switch (testAction) {
            case PREPARE_THROW_XAER_RMERR:
                throw new XAException(XAException.XAER_RMERR);
            case PREPARE_THROW_XAER_RMFAIL:
                throw new XAException(XAException.XAER_RMFAIL);
            case PREPARE_THROW_UNKNOWN_XA_EXCEPTION:
                throw new XAException(null);
            case PREPARE_CRASH_VM:
                Runtime.getRuntime().halt(0);
            case NONE:
            default:
                preparedXids.add(xid);
                return XAResource.XA_OK;
        }
    }

    @Override
    public void commit(Xid xid, boolean onePhase) throws XAException {
        log.debugf("commit xid:[%s], %s one phase, test action: %s", xid, onePhase ? "with" : "without", testAction);
        checker.addCommit();

        switch (testAction) {
            case COMMIT_THROW_XAER_RMERR:
                throw new XAException(XAException.XAER_RMERR);
            case COMMIT_THROW_XAER_RMFAIL:
                throw new XAException(XAException.XAER_RMFAIL);
            case COMMIT_THROW_XA_RBROLLBACK:
                throw new XAException(XAException.XA_RBROLLBACK);
            case COMMIT_THROW_UNKNOWN_XA_EXCEPTION:
                throw new XAException(null);
            case COMMIT_CRASH_VM:
                Runtime.getRuntime().halt(0);
            case NONE:
            default:
                preparedXids.remove(xid);
        }
    }

    @Override
    public void rollback(Xid xid) throws XAException {
        log.debugf("rollback xid: [%s]", xid);
        checker.addRollback();
        preparedXids.remove(xid);
    }

    @Override
    public void end(Xid xid, int flags) throws XAException {
        log.debugf("end xid:[%s], flag: %s", xid, flags);
    }

    @Override
    public void forget(Xid xid) throws XAException {
        log.debugf("forget xid:[%s]", xid);
        preparedXids.remove(xid);
    }

    @Override
    public int getTransactionTimeout() throws XAException {
        log.debugf("getTransactionTimeout: returning timeout: %s", transactionTimeout);
        return transactionTimeout;
    }

    @Override
    public boolean isSameRM(XAResource xares) throws XAException {
        log.debugf("isSameRM returning false to xares: %s", xares);
        return false;
    }

    @Override
    public Xid[] recover(int flag) throws XAException {
        log.debugf("recover with flags: %s", flag);
        return preparedXids.toArray(new Xid[0]);
    }

    @Override
    public boolean setTransactionTimeout(int seconds) throws XAException {
        log.debugf("setTransactionTimeout: setting timeout: %s", seconds);
        this.transactionTimeout = seconds;
        return true;
    }

    @Override
    public void start(Xid xid, int flags) throws XAException {
        log.debugf("start xid: [%s], flags: %s", xid, flags);
    }

    public List<Xid> getPreparedXids() {
        return preparedXids;
    }
}
